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Book Chapter

Evaluation of the compatibility of building limestones from salt crystallization experiments

By
Kévin Beck
Kévin Beck
Centre de Recherche sur la Matière Divisée, Université d'Orléans - CNRS-CRMD, 1B rue de la Férollerie 45071 Orléans Cedex 2, France
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Muzahim Al-Mukhtar
Muzahim Al-Mukhtar
Centre de Recherche sur la Matière Divisée, Université d'Orléans - CNRS-CRMD, 1B rue de la Férollerie 45071 Orléans Cedex 2, France
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Published:
January 01, 2010

Abstract

Salt absorption in porous building stones contributes greatly to the degradation of monuments. Two French porous limestones with similar main characteristics (total porosity, densities and mechanical resistance) were studied: white Tuffeau and Sebastopol stone. Accelerated ageing (weathering) tests were carried out by applying immersion-drying cycles with water containing sodium sulphate or sodium chloride. Samples of the two stones were tested separately and then in sets containing both rock varieties. The results facilitated interpretation of the observed and measured responses of these two limestones to the cycling salt crystallization. The durability of studied stones was evaluated by determining the normalized weight changes during the applied cycles. The Sebastopol stone amplified the amount of salt stored in the Tuffeau with increasing number of cycles performed, inducing its more rapid degradation. Water retention and water transfer in the pore space were found to be two main factors controlling the rate and the type of stone decay due to the salt crystallization.

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Contents

Geological Society, London, Special Publications

Natural Stone Resources for Historical Monuments

R Přikryl
R Přikryl
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Á Török
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Geological Society of London
Volume
333
ISBN electronic:
9781862395817
Publication date:
January 01, 2010

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